One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,7,6)(3,10,8,4)(5,9,14,15)(11,16,13,12)(17,18,21,24)(19,25,27,22)(20,23,29,32)(26,31,28,30)(33,34,39,36)(35,42,37,40)(38,44,46,41)(43,47,45,48)(1,3)(2,4)(5,13)(6,10)(7,8)(9,16)(11,14)(12,15)(17,19)(18,22)(20,28)(21,27)(23,31)(24,25)(26,29)(30,32)(33,34,39,36)(35,40,37,42)(38,41,46,44)(43,47,45,48)(17,19,21,27)(18,22,24,25)(20,26,29,28)(23,30,32,31)(33,35,39,37)(34,40,36,42)(38,43,46,45)(41,47,44,48)(1,4,7,10)(2,8,6,3)(5,12,14,16)(9,13,15,11)(17,19)(18,22)(20,26)(21,27)(23,30)(24,25)(28,29)(31,32)(33,36,39,34)(35,40,37,42)(38,44,46,41)(43,47,45,48)(1,5)(2,9)(3,11)(4,12)(6,15)(7,14)(8,13)(10,16)(17,20,21,29)(18,23,24,32)(19,26,27,28)(22,30,25,31)(33,37,39,35)(34,40,36,42)(38,45,46,43)(41,47,44,48)(1,6,7,2)(3,10,8,4)(5,9,14,15)(11,12,13,16)(17,18)(19,22)(20,23)(21,24)(25,27)(26,30)(28,31)(29,32)(33,38,39,46)(34,41,36,44)(35,43,37,45)(40,47,42,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.